Equalities, Comparisons, and Operations

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Description

Explore equalities, inequalities, the equal sign, and operations with the Cool Chameleons. This set includes:

* 36 addition and subtraction cards with representations of numbers 0-18. The background color of the cards makes differentiation simple: blue background for 0-12, red background for 13-18. Use the cards to match expressions for numbers (CCSS 1.OA.3,1.OA.6) and compare the value of numerical expressions (CCSS 1.OA.7). Print multiple sets of these cards for a great game of War!

* A poster comparing chameleons’ changing colors with changing representations for numbers (CCSS 1.OA.7).

* Math tools to provide support as needed: thematic number line and 120 chart

* Assessment page with answer key

Colorful Chameleons Graphics by Charlotte Braddock at Charlotte's Clips.

Thanks for your interest in this resource! You may also be interested in Names for Numbers:1-24 on the Common Core Snail Trail

Linda Nelson
Total Pages
12 pages
Answer Key
N/A
Teaching Duration
N/A
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Standards

to see state-specific standards (only available in the US).
Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 - 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.
Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
Apply properties of operations as strategies to add and subtract. If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)

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